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http://dx.doi.org/10.9714/psac.2009.11.4.020

MOD-processed YBCO coated conductors on the $CeO_2$-buffered IBAD-MgO template  

Shin, G.M. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University)
Ko, R.K. (Superconducting Material Researck Group, Korea Electrotechnology Research Institute)
Oh, S.S. (Superconducting Material Research Group, Korea Electrotechnology Research Institute)
Moon, S.H. (Superconducting Material Research Group, Korea Electrotechnology Research Institute)
Yoo, S.I. (Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University)
Publication Information
Progress in Superconductivity and Cryogenics / v.11, no.4, 2009 , pp. 20-24 More about this Journal
Abstract
YBCO coated conductors (CC) on the $CeO_2$-buffered IBAD-MgO template were fabricated by metal-organic deposition (MOD) Process with Ba-trifluoroacetate and fluorine-free Y and Cu precursor materials. The precursor solution was coated on $CeO_2$-buffered IBAD MgO templates using the multiple dip-coating method, decomposed into inorganic precursors by pyrolysis up to $400^{\circ}C$ within 3 h, and finally fired at $740{\sim}800^{\circ}C$ in a reduced oxygen atmosphere. Microstructure, texture, and superconducting properties of YBCO films were found highly sensitive to both the firing temperature and time. The high critical current density ($J_C$) of $1.15\;MA/cm^2$ at 77.3K in the self-field could be obtained from $1\;{\mu}m$ thick YBCO CC, fired at $740^{\circ}C$ for 3.5 h, implying that high performance YBCO CC is producible on IBAD MgO template. Further enhancement of $J_C$ values is expected by improving the in-plane texture of $CeO_2$-buffer layer and avoiding the metal substrate contamination.
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